diff --git a/asabiris/output/msteams/service.py b/asabiris/output/msteams/service.py
index a2824c7..5076bf4 100644
--- a/asabiris/output/msteams/service.py
+++ b/asabiris/output/msteams/service.py
@@ -40,7 +40,7 @@ async def send(self, body, tenant):
         webhook_url = self.TeamsWebhookUrl
 
         # If tenant-specific MS Teams configuration is available, fetch the webhook URL
-        if tenant:
+        if tenant and self.ConfigService is not None:
             try:
                 webhook_url = self.ConfigService.get_msteams_config(tenant)
             except KeyError:
diff --git a/asabiris/output/slack/service.py b/asabiris/output/slack/service.py
index 5e0e2e9..3c689aa 100644
--- a/asabiris/output/slack/service.py
+++ b/asabiris/output/slack/service.py
@@ -51,7 +51,7 @@ async def send_message(self, blocks, fallback_message, tenant=None) -> None:
 
 		token, channel = (self.SlackWebhookUrl, self.Channel)
 
-		if tenant:
+		if tenant and self.ConfigService is not None:
 			try:
 				token, channel = self.ConfigService.get_slack_config(tenant)
 			except KeyError: